Vinca difformis

Vinca difformis, commonly called the intermediate periwinkle, is an evergreen, flowering subshrub. It grows to about 0.5 metres (1+1⁄2 ft) tall, and forms mats over 1 m (3+1⁄2 ft) across. Its whitish-blue flowers have a blooming season from late winter to early spring. It is native to Western Europe, including the Iberian Peninsula, France, the Italian Peninsula and Sardinia.